Funny is that APs EXGF lives in the same town, she is still scorned about what happened.
M8, so are you. You are still trying to make sense of it all. Newsflash, there is no sense to be made in this whole mess. And you trying to make sense of it is just a HUGE waste of time, that would be MUCH more wisely spent on improving yourself, and upgrading yourself to Manta 2.0. You are not even aware the potential you can unlock if you choose to work on yourself. Amazing stuff can happen, awesome people will be attracted into your life. But that is not going to happen, if you keep moping about.
Recognize the fact that she is on a journey of her own, and you have your journey to take. Delete her from your life, remove the photos, remove her stuff that reminds you of her, remove her music, her clothes, her gifts. Lock them away where you will not be bombarded daily with memories of her.
One more thing you should know. It is very likely you are looking at her with rose colored glasses. That means you are way over romanticizing the relationship. Your mood will swing and swing violently. First you will be thinking how you still love her and that you would do anything to get her back, desperatly trying to find that illusive silver bullet that will fix it all, and the next moment you will wbe screaming That Fcuking B*tch! from the top of your voice.